Download Microsoft security essentials from Microsoft and it will be better because Microsoft knows better about the operating system.

Security Essentials from Microsoft can be downloaded from the below link

http://www.microsoft.com/security_essentials/

Try to login to the safe mode of your computer and scan your computer and try to see any virus is in your system.

After restarting the computer press F8 button of the key will it will show you the boot menu with options you can select safe mode and it will not all the device drivers and then try to run the antivirus software and check for virus.D.Jeya Kumar(JK)MVPhttp://tamilpadamcomedy.blogspot.com

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